Pivot lift and hold-down for revolving doors



T. M. HAGENEOOK PIVOT LIFT AND HOLD-DOWN FOR REVOLVING DOORS Aug. 2, 1938.

Filed April 8, 1957 2 Sheets-Sheet l 0 INVENTOR. fageM/QO A TTORNEY "lull ,im

cou/,0, V 24 5 Aug- 2', 1938 T. M. HAGENBooK 2,25,498

PIVOT LIFT AND HOLD-DOWN FOR REVOLVING DOORS Filed April 8, 1957 2 Shees-Sheet 2 *l EI, E"- E I E" 1D Fim BY 6 wk ATTORNEY y;

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Patented Aug. 2, 1938 PATENT OFFlCE PIVOT LIFT AND HOLD-DOWN FOR REVOLVING DOORS Thurloe M. Hagenbcok, Evansville, Ind., assignor to International Door Company,

Evansville,

Ind., a corporation of Illinois Application April 8, 1937, Serial No. 135,781

11 Claims.

My invention relates broadly to revolving door mechanism and more particularly to a Vconstruction of pivot lift and hold-down for revolving doors.

One of the objects of my invention is to provide an improved construction of pivot lift and holddown for revolving doors which may be readily operated upon' the insertion of a suitable tooly through an aperture aligned with a pivoted lever device for effecting the withdrawal of a locking pin from engagement with a recess in one limiting position to allow movement of the pivot lift' to the other opposite limiting position and engagement of 'the' locking pin' in the recess located T at the other prearranged recess.

Another object of my invention is to provide a construction of a fulcrumed lever device disposed within the tubular housing of the shaft of a revolving door and manually displaceable against the action of a spring device removing a locking pin carried by a' member connected with the pivot lift of a revolving' door, from either of i two recesses in the tubular shaft ofthe revolvingl door and Yallowing the pivot lift to be shifted Y, from a hold-down position toa retractedposition and vice versa.

Still another object of my invention is to pro` vide an improved construction of pivot lift and hold-down for revolving doors in which a member connected with the pivot lift is vertically shiftable within the tubular shaft of a revolving door and wherein the member carries `a rockable lever device engaged at one end with a locking'pin and engaged at the opposite end by a spring actuated g5- device tending to maintain the locking pin inengagement with recesses in the interior wall of the tubular shaft and'operative to'maintai'n the pivot lift either in a projected position'ora re-" tractedposition,

' A further object of my"invention` is to provide a constructionV of' pivot lift' and hold-down4 forrevolvin'g doors in which Iaffuicrumed lever device is`pivotally mounted 'on a member conf nected with the pivot lift and shiftable interirly within the tubular shaft of a revolving door, one

by means of a tool insertable through the hous-' ing of the tubular shaft for withdrawing the j locking pin lfrom engagedposition and'allowing movement of the pivot lift to the opposite limit ing position thereof. Y

Other and further objects of my invention reside in the simplified and improved construction of pivot lift and hold-down for revolving doors as set forth more fully in the specification hereinafter following by reference to the accompanying drawings in which: Figure 1 is a vertical sectional View showing the, improved pivot lift and hold-down of my invention in projected position for normal operation of the revolving doors with certain of the parts shown partially in side elevation; Fig. 2 is a vertical sectional View of the pivot lift and hold-down showing the pivot lift in retracted position in which the revolving doors may be moved to one side of the drum of the revolving door or the position in which the pivot lift is adapted to be projected for centering the revolving doors with respect to thelower support for the revolving doors with certain of the parts shown partially lin side elevation; Fig, 3 is an enlarged cross sectional view-showing the latching mechanism of my invention with the locking pin engaged in its extreme upper position for maintaining the pintle in retracted position; Fig. 4 is an enlarged cross sectional view showing the latching mechanism under control of the actuating tool with the locking pin displacedl from latching position for shifting the pintle to projected position, the View showing the fulcrumed lever about to be released under control of the hand tool whereby the spring means operative against one end of the lever is effective to eject the locking pin into the lower recess in r the tubular shaft of the revolving door; Fig. 5 J is a cross sectional View of the latching mechanism and showing the manner in which the locking pin enters the lower recess in the interior side wall of the tubular shaft when released'by the actuating'tool; Fig. 6 is a. transverse sectional view taken on line 6 6 of Fig. 3 with the actuating spring and spring pressed stop illustrated in elevation; Fig. 'l is a transverse sectional View taken on line 1 1 of Fig. 3 sho-wing the transversely shiftable locking pin in elevation; Fig. 8 is a perspective view of the fulcrumed member which is connected with the pivot lift; Fig. 9 is a perspective View of the rockable lever device employed for controlling the locking pin in the latching mechanism of my invention; Fig. l0 is an elevational view partially broken away and shown in section and illustrating the central member which is shiftable within the hollow tubular shaft of the revolving door for transmitting motion to the pvot lift; and Fig. 11 is a longitudinal sectional View through the shiftable member illustrated in Fig. 10 taken on line II-II thereo-f.

The purpose of my invention is to overcome the difficulties that have heretofore arisen in pivot lifts for revolving doors. Because of the fact that the assembly of the shaft of the revolving door has considerable weight it is necessary to provide a method of holding the pivot that will be strong enough to carry the entire weight of the shaft assembly. The reason for this provision is that in the erection of the revolving door it is necessary to stand the shaft assembly vertically and in event that the weight of the shaft is accidentally thrown onto the pivot, it is essential that the rest of the pivot mechanism be strong enough to carry this load. My present invention constitutes an improvement over the invention set forth in myl application SerialrNo. 120,818, filed January 15, 1937 for Pintle control mechanism for revolving doors. Y

The central tubular shaft of the revolving door is shown at I. For purposes of simplification I have not shown the revolving door' hardware which is mounted adjacent the central tubular shaft I. The tubular housing for the central tubular shaft is indicated at 2 including the lon- Y gitudinally extending recesses 3 and the radially disposed spacer members 4. Suitable connections are provided between housing 2 and shaft I by means of interconnected radially disposed web members shown generally at 2a extending into grooves Iain the exterior wall of tubular shaft I. The top of central tubular shaft I is carried in the usual trolley structure of the character set forth more fully in my copending application Serial No. 35,395 filed August 8, 1935. The lower end of the central tubular shaft VI contains the pintle structure set forth. more fully in my copending application Serial No, 115,431, filed December 11, 1936. The mechanism for operating the pivot lift and hold-down is arranged intermediate the upper and lower hardware members and relatively below the midway position between the hardware members. Centrally within the central tubular shaft I, I provide the central member 5 having a socket portion I5 in the lower end thereof into which the upper end of member 'I which connects to the pintle, extends. Coil spring 8 provides means tending to continuously eject member 'I for maintaining the pintle in the lower support. A pin 9 carried by member I extends through the slot I9 in member 5 for limiting the position to which member 'I is projected and to provide positive means for lifting the pintle from the lower supporty when the revolving doors are collapsed and ready for movementin collapsed position adjacent one side of the drum ofv the revolving door. y Y

Member 5 is'provided with transversely extending apertures II, I2 and I4 which arescrew threaded to receive screws I5, I6 and I'I. Screws I5 and I6 pass through the fulcrum member I8 maintaining said'member in position with respect to member 5. The fulcrum member I8 has a width slightly narrower than the slot I9 in the central tubular shaft I to allow vertical shifting movement of member 5. The fulcrummember I8 has a horizontally extending portion 20 vwhich serves as a pivot means or fulcrum for the lever arm 2l as shown. The lever arm 2| bears against the spring pressed stop 22 at one end. The spring pressed stop 22 is continuously urged outwardly by means of coil spring 23 maintained in trans- The passage 29 has a bore slightly larger in diameter than the diameter of lock pin 28 so that the lock pin is capable of reciprocation into and out of engagement with the upper `aperture 39 or lower aperture 3| in central tubular shaft l with which the recesses 39a and 31a in housing 2 are aligned. The lock pin 28 constitutes a selector pin which may be ejected into either upper aperture 30 or lower aperture 3l in shaft i for maintaining the pivot lift either in a retracted or a projected position. The head or locking pin 28 is flanged at 28a. and 28h for engaging opposite sides of the bifurcated end of lever member 2l while allowing rocking movement between the end of lever member 2l and the end ofthe lock Vpin 28 thereby facilitating the reciprocatory movement of the locking pin.

A spacer member 32 is secured to member 5 by means of screw l1 in alignment with member I8 and ina position capable of vertical movement in slot I9 in tubular shaft I.

Members i8 and 32 each carry radially projecting interiorly screw threaded lugs 33 and 3G which serve as separators and mounting means for the cover plate 35. Coverplate 35 is apertured for the passage of screws 36 and 3'! which engage the screw threads in the radially extending lug members 33 and 34. The cover plate 35' is apertured at 38 directly in alignment with the upper end of lever member 2I.

In the operation of the pivot lift and hold-down of my invention, a suitable tool is inserted through aperture 38 inthe plate member 35 for depressing the upper end of lever arm 2l against the outward force exerted by coil spring 22. This movement ejects locking pin 28 from a position engaged in either of the apertures 39 or 3l in the hollow tubular shaft l, whereby member 5 may be shifted vertically from one limiting position to another limiting position.

The tool shown generally at 4I) in Fig. 4, which is inserted through aperture 38 for depressing lever member 2l for ejecting locking pin 28 also serves as a means for moving member 5 vertically with respect to the tubular shaft i.

'I'he dimensions of cover plate 35 are such that the adjacent slots behind cover plate 35 will always be completely covered by plate member 35. That is to say, the member 4 is slotted at 39 along outwardly converging lines and throughout `a width sufficient to allow vertical movement Vof member I8 and 32, whileV limiting the space through which dust', moisture, or other foreign matter might tend to enter'the central tubular shaft I.

The structure of my invention is particularly advantageous because no bending moment is exerted against the locking pin; The only substantial force to which locking pin 28 is subjected is a slight shearing moment. However, locking pin 28 has a high shear strength which far exceeds the tensile or compression strength of member 5. The strength of locking pin 28 is such that member 5 would be deformed in the aperture 29 through which locking pin 28 passes before the locking pin 28 would fail.

' indicated generally at 50.

Spring 23 is constructed of such size that lever member V2| can only be displaced by the application of a substantial force on the tool inserted through aperture 28. The advantage of this is that the unauthorized person is vthus prevented from actuating the pivot lift and hold-down.

The tool which is employed for actuating lever member 2l in ejecting locking pin 28 may be a combination device, also employed for controlling the position of the roller latching panic release mechanism in the revolving door hardware. It is impossible for the unauthorized person to actuate the ypivot lift and hold-down by any application of a light weight member such as a pencil or by means of the nger.

The return of locking pin 28 is wholly automatic after anejecting operation of pin 28 has been accomplished. As soon as the pivot lift is shifted to a position in which the lock pin 28 is aligned with either aperture 3i) or 3| the locking pin automatically enters the apertures maintaining the pintle in the position to which the mechanism has been shifted.

The member 'l passes through a gasket member 4I centered within the tubular shaft I and resting upon the shoulder formed by member 42, The pivot lift 43 is centered within hollow tubular shaft I by sleeve member 44 and is connected with member 42 through threaded member 45. 'Ihreaded member 45 is provided with a head 46 shiftable within limits in the socket recess 41 in member 42. Bearing plates 48 and 49 are provided between member 42 and pivot lift 43 providing an annular race Way for the ball bearings The lower end of the tubular shaft l is centered with respect to the shaft housing 2 by sleeve member shown generally at 5|. The pintle 52 has a frusto-conical shaped end with a transverse slot therein engageable with the correspondingly tapered recess 53 and the transversely extending member 54 in the lower supporting plate 55. The lower supporting plate 55 is mounted in the base member 56 which in turn is supported in the foundation shown generally at 51.

The pivot lift and hold-down of my invention has been found to be practical in manufacture and production and successful in operation. I realize, however, that modifications of the structure of my invention may be made and accordingly I do not intend that my invention shall be limited to the particular structure illustrated.

I contemplate by my invention all constructions y which maybe embraced by the scope of the apa locking pin extending transversely through said first mentioned member and connected with one end of said lever member, said locking pin being -engageable with spaced recesses in the interior wall of said tubular shaft, and spring means engageable with the opposite end of said lever member and tending to normally shift said lever member into a position for ejecting said locking pin into a position engaging a selected recess in said tubular shaft.

Y2. A pivot lift and hold-down for revolving doors comprising a tubular shaft for revolving doors recessed at spaced positions in the interior wall thereof, a pintle control member extending centrally through said shaft, a locking pin mounted for reciprocative movement transversely through said member and engageable with the spaced recesses in the interior wall of said tubular shaft for maintaining the pintle control member in either a retracted or a projected position, and a lever member pivotally mounted with respect to said first mentioned member, said lever member being engageable at one end with said locking pin and being spring pressed at the opposite end for normally urging said locking pin to a position engaging the recesses in said shaft.

3. A pivot lift and hold-down for revolving doors comprising a central tubular shaft recessed at spaced intervals interiorly thereof, a pintle control member axially disposed within said shaft, a locking pin extending transversely through said pintle control member and shiftable into and out of the recesses in the interior wall of said tubular shaft, and a rockably mounted lever pivoted with respect to said pintle control member, said lever being engaged at one end with said locking pin and being spring pressed at the opposite end for normally tending to eject said locking pin into the recesses in said tubular shaft.

4. A pivot lift and hold-down for revolving doors comprising a central tubular shaft recessed at spaced intervals interiorly thereof, a pintle control member axially disposed within said shaft, a locking pin extending transversely through said pintle control member and shiftable into and out of the recesses in the interior wall of said tubular shaft, a fulcrum member carried by said pintle control member, a lever pivotally vmounted on said fulcrum member and extending through a longitudinally slotted portion of said tubular shaft, one end of said lever member being bifurcated and engaging said locking pin and the other end of said lever member being spring pressed for normally tending to shift said -locking pin into the recesses interiorly of said tubular shaft. 5. A pivot lift and hold-down for revolving doors comprising a central tubular shaft recessed at spaced intervals interiorly thereof, a pintle control member axially disposed within said shaft, a locking pin extending transversely through said pintle control member and shiftable into and out of the recesses in the interior wall of said tubular shaft, said central tubular shaft being longitudinally slotted for the passage of the controlling end of said locking pin, a fulcrurn member carried by said pintle control member and projecting through the slotted portion of said central shaft, said fulcrum member providing a pivot extending transversely of said pintle control member, and a lever rockably mounted on said fulcrurn and engageable at one end of the control end of said locking pin and being spring pressed at the opposite end for normally tending to eject said locking pin into the recesses in said ,tubular shaft.

6. A pivot lift and hold-down for revolving doors comprising a central tubular shaft recessed at spaced intervals interiorly thereof, a pintle control member axially disposed within said shaft, a locking pin extending transversely through said pintle control member and shiftable into and out of the recesses in the interior wall of said tubular shaft, said central tubular shaft having a longitudinal slot at one side thereof through which the controlling end of said locking pin extends, a fulcrum member carried by said pintle 'control member and extending through the slotted portion of said central tubular shaft and providing a pivot extending transve'rsely to the axis of the pintle control member, and aflever member mounted'on said fulcrum and displaceable in a longitudinal plane passing through the axis of said pintle control member, one end of' said lever member engaging the con-. trolling end of said locking pin and the other end of said lever member being spring pressed for normally urging said locking pin into the recesses in the interior Wall of ysaid central shaft.

7. A pivot lift and heid-down for revolving doors comprising central tubular shaft recessed at spaced intervals interiorly thereof, a pintle control member axially disposed Within said shaft, a locking pin extending transversely through said pintle control member and shiftable into and out of the recesses in the interior Wall of said tubular shaft, the central tubular shaft being slotted forl the passage of the controlling end of said locking pin, a fulcrum member carried by said pintle control member and providing a pivot extending transversely of the axis of said pintle control member, a lever device pivotally mounted on said transversely extending pivot and operative for movement in a vertical plane passing through the axis of said pintle ccntrol member, one end of said lever device engaging the controlling end of said locking pin and spring means carried by said pint-ie control member and effective against the other end of said lever device and tending to shift said lever device to a position in which said locking pin tends to normally engage the recesses in said central shaft.

8. A pivot lift and hold-down for revolving doors comprising a central tubular shaft, a pintle control member extending axially through said shaft, a housing for said shaft, said shaft and housing being recessed at spaced intervals at one side thereof and having aligned slots therein in the `opposite side thereof, a lever member transversely pivoted with respect to said pintle control member and exten-ding through the aligned slots in said shaft and housing, a plate member supported in spaced relation to said pintle control member and extending over the aligned slots in said shaft and housing and enclosing said lever member, a locking pin transversely slidable through said pintle control member and engagey able with the recesses in the Wall of said central shaft, one end of said lever member engaging said locking pin, spring means engageable with the opposite end of said lever member for normally urging said lever memberY to a position in which the locking pin engages the recesses in the central tubular shaft, said plate member being apertured for the passage of a tool engageable with said lever member in a position counteracting the effect of said spring means upon said lever member and effecting a withdrawal of said locking pin from the recesses in said tubular shaft.

9. A pivot and hold-down for revolving doors comprising a central tubular shaft, a pintie control member extending axially through sai-d shaft,`a housing for said shaft, said shaft and housing being recessed at spaced intervals at one side thereof and having aligned slots therein in the opposite side thereof, a lever member transversely pivoted with respect to said pintle control member and'extending through the aligned slots in said shaft and housing, a plate member supported in spaced relation to said pintle control member and extending over the aligned slots in said shaft-and housing and enclosing said lever member, a lockingv pin transversely slidable through said pintle control member and engageable with the recesses in the Wall of said central shaft, one end of said lever member engaging said locking pin, spring means carried in a transversely extending vrecess in said pintle controi member and operative against theropposite end of said lever member for normally urging said lever'member to aposition in which the locking pin engages the recesses inthe central tubular shaft, said plate member being apertured for the passage of a tool engageable with said lever member in a position counteracting the effect of said spring means uponsaid lever member and effecting aivithdrawal of said locking pin from the recesses in said tubular shaft. l

10.` A pivot lift andhold-down for revolving doors `*comprising Ya tubular shaft, ay `pintle retractable and projectable through said tubular shaft, apintle control mechanism connected with the' pintle,a housing for said tubular shaft, said tubular vshaft and housing being longitudinally slotted through one side thereof adjacent said pintle control member and having recesses opposite said slots extending into the interior Wall of said tubular shaft, a pair of spacer members carried by said pintle control member and projecting through the aligned slots in said central shaft and said housing, a plate member carried by sai-d spacer members and substantially closing the slot in said housing, a locking pin transversel ly slidable through vsaid pintie control member and selectiveiy engageable With the recesses in said central tubular housing, a lever member transversely pivoted with respect to said pintle Control member, one end of Said lever member engaging said locking pin, and spring means carried by said pintle control member and Operative against said lever member for normally ejecting said locking pin into the recesses in said tubular shaft, the spring pressed end of said lever member being aligned With an aperture in said plate member for allowing the insertion of a tool engageable with the end of said lever member for counterbalancing the effect of said spring means and allowing the Withdrawal of said locking pin from the recesses in said central shaft member.

` 11. In a pivot lift and hold-down for revolving doors, in combination with a revolving shaft and a retractable pintle therefor, spring pressed lever means mounted on a pintle actuating member and engageable'with aV transversely movable locking pin carried by said member andV operative with respect to said shaft.

THURLOE M. HAGENBOOK. 

